archtika/rest-api/db/migrations/20240808141708_collaborator_not_owner.sql

-- migrate:up
CREATE FUNCTION internal.check_user_not_website_owner()
RETURNS TRIGGER AS $$
BEGIN
  IF EXISTS (
    SELECT 1
    FROM internal.website
    WHERE id = NEW.website_id AND user_id = NEW.user_id
  ) THEN
    RAISE foreign_key_violation USING MESSAGE = 'User cannot be added as a collaborator to their own website';
  END IF;

  RETURN NEW;
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;

CREATE CONSTRAINT TRIGGER check_user_not_website_owner
AFTER INSERT ON internal.collab
FOR EACH ROW
EXECUTE FUNCTION internal.check_user_not_website_owner();

-- migrate:down
DROP TRIGGER check_user_not_website_owner ON internal.collab;
DROP FUNCTION internal.check_user_not_website_owner();